CVE-2026-45783CWE-20CWE-400

libp2p: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes

High · published June 10, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
42.1
In the wild
Unconfirmed
What it is

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUT_VALUE messages whose keys bypass all content validation. No credentials, no prior relationship, and no protocol deviation beyond a crafted key are required. The victim node's datastore fills until the host disk is exhausted, making the node unavailable. This issue has been patched in version 16.2.6.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00503 · 42.1th percentile
Weaknesses
CWE-20 · Improper Input Validation; CWE-400 · Uncontrolled Resource Consumption
Published
2026-06-10T21:09Z
EPSS history
Timeline
  • 10 JUN 21:09Z
    libp2p: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes
    cvelistv5